<template>
  <view class="cart-container" v-if="cart.length !== 0">
    <!-- 收货地址 -->
    <my-address></my-address>
    <!-- 商品的标题区域 -->
    <view class="cart-title">
      <!-- 左侧的图标 -->
      <uni-icons type="shop" size="18"></uni-icons>
      <!-- 右侧文本 -->
      <text class="cart-title-text">购物车</text>
    </view>
    
    <!-- 滑动删除 -->
    <uni-swipe-action>
      <block v-for="(goods, i) in cart" :key="i">
        <!-- uni-swipe-action-item 可以为其子节点提供滑动操作的效果。需要通过 options 属性来指定操作按钮的配置信息 -->
        <uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)">
          <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler" @num-change="numberChangeHandler"></my-goods>
        </uni-swipe-action-item>
      </block>
    </uni-swipe-action>
    
    <!-- 结算部分 -->
    <my-settle></my-settle>
    

  </view>
  
  <!-- 空白购物车区域 -->
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" class="empty-image"></image>
    <text class="tip-text">空空如也</text>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  import { mapState, mapMutations } from 'vuex'
   
  export default {
    // 导入购物车徽标mix文件
    mixins: [badgeMix],
    computed: {
      ...mapState('m_cart', ['cart'])
    },
    data() {
      return {
       options: [{
             text: '删除', // 显示的文本内容
             style: {
               backgroundColor: '#C00000' // 按钮的背景颜色
             }
           }]
      };
    },
    methods: {
      ...mapMutations('m_cart',['updateGoodsState','updateGoodsCount','removeGoodsId']),
      radioChangeHandler(e) {
        // 得到my-goods子组件中购物车数据id和反向勾选状态
        // console.log(e)
        // 修改vuex中购物车数据
        this.updateGoodsState(e)
      },
      // 购物车数量自定义事件
      numberChangeHandler(e) {
        // console.log(e)
        // 将子组件新传入的数据调用vuex方法，修改本地数据
        this.updateGoodsCount(e)
      },
      swipeActionClickHandler(e) {
        // console.log(e)
        this.removeGoodsId(e)
      }
    }
  }
</script>

<style lang="scss">
  .cart-container {
    padding-bottom: 50px;
  }
  .cart-title {
    height: 40px;
    display: flex;
    align-items: center;
    padding-left: 5px;
    font-size: 14px;
    border-bottom: 1px solid #efefef;
    
    .cart-title-text {
      margin-left: 10px;
    }
  }
  
  .empty-cart {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 150px;
    
    .empty-image {
      width: 90px;
      height: 90px;
    }
    .tip-text {
      font-size: 12px;
      color: gray;
      margin-top: 15px;
    }
  }
</style>
